Rome, July 19 - A Roman mausoleum and domus (house) have emerged from under a "mini-dump" of tin cans in a park at Rome's ancient port of Ostica Antica. The head of Ostia Antica's archaeological superintendency, Paola Germoni, and the American Institute for Roman Culture's director, Darius Arya, presented the find at a press conference Friday. Germoni said the two bodies had worked with students from 14 US universities on two parts of the park. "They found a circular-plan mausoleum clad with travertine blocks which had its initial stage between the end of the first century BC and the start of the first century AD, with stages of re-use up till the fifth century AD," she said. "Furthermore, a wall structure from late antiquity was discovered under the humus of the park and the illegal waste dump which revealed a beautiful polychrome marble-covered pavement, from the fourth-fifth century AD. "We believe it was a domus, whose level of pavement work denotes a certain refinement," Germoni said. The ancient Roman house "was found under a mini-dump dotted with tin cans," she said. Ostia Antica rivals Pompeii for its archaeological interest although it receives far fewer visitors than the city buried by Vesuvius in 79 AD.